blood test

noun

: a test of the blood

specifically : a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (such as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of a particular disease or medical condition (such as diabetes, cardiovascular disease, or cancer) or serve to indicate the degree of function of a specific organ (such as the liver or kidney)

Examples of blood test in a Sentence

He had a blood test, and the doctor who did it said his cholesterol was too high.

Recent Examples on the Web

If there is new or worsening muscle pain, your healthcare provider may examine you and perform a blood test. —Korin Miller, Flow Space, 23 Apr. 2025

However, very high doses of biotin can interfere with lab tests, including blood tests for thyroid function, heart health, and hormone levels. —Lindsay Curtis, Verywell Health, 11 Apr. 2025

Urine Test Urine tests were historically more common to use than blood tests. —Julia Ries, Health, 9 Apr. 2025

Authorities conducted a blood test for carbon monoxide and found a saturation level of 64% in Gardner's body, said Randall Zuniga, director of the Costa Rican Judicial Investigation Department. —David Brennan, ABC News, 3 Apr. 2025

Word History

First Known Use

1851, in the meaning defined above

Rhymes for blood test

• abreast
• accessed
• addressed
• appressed
• armrest
• arrest
• assessed
• attest
• backrest
• behest
• bequest
• caressed

Kids Definition

blood test

noun

: a test of the blood (as to detect the presence of disease-causing agents or determine the number of blood cells)

Medical Definition

blood test

noun

: a laboratory test in which a sample of blood is withdrawn from the body to analyze the level of substances or cells (as glucose, hemoglobin, or white blood cells) that indicate the presence or probable development of a particular disease or medical condition (as diabetes, cardiovascular disease, or cancer) or serve to indicate the degree of function of a specific organ (as the liver or kidney)